Significant Accounting Policies - Additional Information (Detail) (USD $)	9 Months Ended
Sep. 30, 2014 State Facility	Sep. 30, 2013
Significant Accounting Policies [Line Items]
Number of quarries distribution facilities and plants	420
Number of states with aggregates business sales by destination	30
Other comprehensive loss before reclassifications for pension and postretirement benefit plans, tax	$ 280,000	$ 1,514,000

Amount of tax (expense) benefit, before reclassification adjustments, related to (increase) decrease in accumulated other comprehensive (income) loss related to pension and other postretirement benefit plans.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e640-108580

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration